Malicious PDF — malware analysis report

Static analysis result for SHA-256 1428b15cce95bbb9…

MALICIOUS

PDF

72.3 KB Created: 2021-03-04 18:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ab7838eb5b10d7d6c04dffd320d17bfa SHA-1: cf76702f0037185d9b912bbc12cc565d635be31a SHA-256: 1428b15cce95bbb91014848c28a45b25e09effb51d5b21b20946a1b37e0942dd
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/award?keyword=schaum%2527s+outline+mathematics+books PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5fdbca7c1f614.pdfIn PDF document text
    • http://remumajisipiv.66ghz.com/mujumomakabe.pdfIn PDF document text
    • http://copyrighthelpcentral.com/how_to_design_a_quantitative_research_studyrd85r.pdfIn PDF document text
    • http://bnatural.space/analytical_geometry_grade_12_notes3afsv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_60238fd611acb.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/g1ihzzv/drawing_light_board_neon_glow.pdfIn PDF document text
    • http://mon-cmso.best/ecb_coach_session_planner_template117s2.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/9817724291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473052/normal_6039028440794.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/hdhc8hb/beastboyshub_the_zombie_hunter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370299/normal_5fdeb380a5678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifovigavij.myartsonline.com/xaxakipogofip.pdfIn PDF document text
    • http://kesotufujurox.rf.gd/new_bhakti_dj_song_2018_video.pdfIn PDF document text
    • http://tuguwobafadurot.rf.gd/pixel_gun_3d_mod_apk_autoskillz.pdfIn PDF document text
    • http://jojomuge.epizy.com/coplanar_waveguide_with_ground_impedance_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff89304-837d-4755-9b72-5df79c650ace/malosobazelokamorija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a765cae6-b0c5-4ee2-ab77-367037ffa8c4/how_to_use_intercom_cisco_phone.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 5284 bytes
SHA-256: 5fb235bd7f082e890d3951ec5ff5e22b411b292a3a96ed6a401c0af140a1a71f
font_01_sfnt_off0000ef6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 10612 bytes
SHA-256: 0b5eddb49c2d02a488f72047cafd646916a1f023770771a936f483b6c110b74e